删除数组中的奇数(JavaScript)

var arr = [1,1,1,2,2,2,3,3,3];
for (var i = 0; i < arr.length; i++) {
if (arr[i] % 2 != 0) {
arr.splice(i,1);
i--
}
}

console.log(arr);


删除数组中的偶数(JavaScript)

var arr = [1,1,1,2,2,2,3,3,3];
for (var i = 0; i < arr.length; i++) {
if (arr[i] % 2 == 0) {
arr.splice(i,1);
i--
}
}

console.log(arr);